Sewing machine



Aug. 24 1926.

B. T. LEVEQUE SEWTNG MACHINE Filed Dec. 21. 1922 2 Patented Aug. 24 1926.

A v 1,596,884 UNITED STATES PATENT OFFICE.

BERNARD T. LE EQUE. or, WENHAM, MAssAcHusE'rrs, assrenoa T0 unrrnnsnon MACHINERY com-cannon; or rarsnson, NEW JERSEY, A CORPORATION on NEW JERSEY.

. snwme MACHINE.

Application filed December 21. 1922. Serial No. 608,318.

- The invention'relates to wax thread lock stitch sewing machines and more-particularly to the mechanism for actuating the needle guide of such machines.

In doing certain classes of work as, for instance, in attaching leather outsoles to shoes, it is frequently'dcsirable'to form a stitch receiving groove in the sole while in doing certain other classes of work as, for instance, in attaching rubber soles to shoes a stitch receiving groove is undesirable. A groove of this character'may be conveniently formed during the sewing by a groove cutting edge on the needle guide provided the actuating mechanism for the guide is adapted to force the guide againstthe work. A. machine provided with such a needle guide way also be adapted fordoing both classes of work provided the actuating mechanism is also adapted to so actuate the guide asto avoid grooving'the work.

It is accordingly the object of the present invention to provide a simple "and efficient mechanism by which aneedle guide having a groove-'forming'edge may be actuated either to groove or to'avoidgrooving the-work and also to provide a mechanism of thischar acter which may be readily incorporated in existing shoe sewing machines'such, for instance, as-the machine knownas the Good year, rapid outsole stitcher without complication and withthe minimum change'in construction.

To these ends the invention contemplates actuating the needle guide through a cam and cam follower which are relatively adjustable by the operator to eithercause the guide to press against the work or to cause the advance movement of the guide to cease before it reaches the work. The cam is preferably inthe form of groove formed in a disk carried by the cam shaft of the machine and the follower is preferably in the form of a roll engaging the groove and mounted on the end of the needle guide actuating lever. The roll engaging surface of the cam groove along that portion which registers with the roll while the needle guide is in advanced position is narrower than the rest of the cam surface and the roll may be adjusted laterally of the surface so that it will be either in or out of the path of the narrow section. When the roll is in the path of the narrow section this section will limit the advance movement of the needle guide so that its groove'forming edge will not act upon the work. When the roll is out of thepath of the narrow section the advance movement of the needle guide may continue until the groove forming edge engages the work and forms agroove therein. The needle guide is I forced against the work by the forward throw of the cam assisted by a spring which draws the needle guideactuating lever ina direction to press the needle guide against the, work. i 1

The inventio will be readily understood from the accompanying drawings in which Fig. 1 is a left hand side elevation showing a needle gulde actuating mechanlsm emdetailed sectional view online 6,'Fig. 5.

In the drawings theinvention is shown applied to an outsole sewing machine having the general construc ion and mode of operation of the machine commonly known asfthe Goodyear rapid outsole stitcherand shown and described' in Patent' No. 473,- 870, dated-April 26, 1892; The'machine is provided with stitch forming and work feeding devices such as shown and described insaid patent,1which include the work supporting table 2 and the curved hook needle- 4 which is carried by the needle segment 6 and oscillated by the actuating lever 8.

The needle guide 10 is provided withgroove cutting edges 12 on opposite sides of the needle and is secured to the segment groove 24 formed in the face of the cam disk 26. A spring 28 is connected to the lever and tends to force it in a direction to press the needle guide against the work; The outer face o-f'the cam groove 24; is cut away along that portion 30 of the groove which registers with the roll 22 when the needle guide is in its advanced position so that this portion of the cam surface is narrower than the remainder. The cam roll 22 is mounted on a stud 32 adjustably secured in the upper end of the bell crank lever 16 by a clamping bolt 34. The end of the stud is provided with a slot 86 for the reception of a screw driver or other tool by which the operator may slide the stud laterally in the end of the lever to bring it into or out of the path of the narrow portion 30 of the cam.

When the roll is adjusted to lie in the{ path of the narrow portion of the cam as indicated in Fig. 2 this portion of the-cam will limit the advance movement of the needle guide so that it will be arrested before its groove forming edge 12 engages the work, thus permitting 'a seam to be sewed without forming a stitch receiving groove in the work. If a groove is to be formed in the work-du'i-ng the sewing of the seam the operator loosens the clamping bolt 34: and moves the stud 32 toward the right in Fig. 2, thus positioning the roll 22 out of the path of the narrow portion 30 of the cam. With this adjustment the needle guide will be forced against the work each time it is advanced and the cutting edge 12 will form a stitch receiving groove duringthe sewing.

To enable the needle guide to be adjusted with relation to the work table the lever 16 is made in two relatively movable sections which are secured together by a clamping bolt 38 passing through a slot in one section and engaging the other. To avoid the engagement of the cutting edge of the needle guide with the work table in case the machine is turned over by hand when no work is in position the lever 16 is provided with a stop screw 40 arranged to engage a fixed part of the machine and limit the forward movement of the needle guide under the influence of the spring 28 when he cutaway portion of the cam groove is in register with the cam roll.

lVhile it is preferred to employ the specific construction and arrangement of parts shown and described in embodying the invention in the machine of the patent above referred to it will be understood that this construction and arrangement is not essen tial and may be varied or modified astound desirable or best suited to the construction and arrangement of the parts of thermachine to which the invention is to be applied.

What is claimed is:

-1. A sewing machine having, in combi nation, stitch forming devices including a hook needle, a needle guide having an edge for forming a stitch receiving groove in the work, mechanism for actuating the needle guide in varying ranges of movement where by it may be caused to groove or avoid grooving the work, said mechanism including a cam,- and a cam follower relatively adjustable to cause the needle guide to either groove or avoid grooving the work.

2. A sewing machine having, in combination, stitch forming devices including'a hook needle, a needle guide having an edge for forming a stitch rece ving groove'in the work, mechanism for actuating the needle guide in varying ranges of movement whereby it may be caused to groove or avoid grooving the work, said mechanism including a cam for oscillating the, needle guide having a surface shaped to prevent engagement of the guide with the Work,and an; adjacent surface shaped to permit its engagement with the work, and a cam follower connected to actuate'the guidev adjustable to cooperate with either surface.

3. A sewing machine having, in c'ombi nation, stitch forming devices including a hook needle, a needle guide having an edge for forming a stitch receiving groove in the work, mechanism for actuating the needle guide in varying ranges of movementwheieby it may be caused to groove or avoid grooving the work, said mechanism including a;

cam disk provided with a cam groove shaped to advance and retract the needle guide and having a portion of that part of its surface which determines the advance movement of the needle guide cut away, a lever connected to oscillate the needle guide, and a cam roll on the lever adjustable to register either with the cutaway portion or with the remaining portion of that part of the groove which determines the advance movement of the guide.

' BERNARD T. LEVEQUE. 

